The general this character is portraying is Leslie R. Groves He recruited Robert Oppenheimer for the Manhatten Project.

An interesting factoid I learned researching this was that Oppenheimer attempted to poison one of his professors at Cambridge. Here’s a clip of Oppenheimer after the bomb drop. I can’t imagine whats going on in that brilliant mind. He would look completely detached if it wasn’t for the tear in his eye. Perhaps he thinks he’s won?

And here’s a fun song to break up all that creepiness.